1. introduce or originate.   Hint First letter clue   2. increase in size or strength.   First letter clue   3. soak in some medium till saturated.   First letter clue   4. melt ores for extraction of metal.   First letter clue   5. remove unwanted stuff; purify or cleanse.   First letter clue   6. burn without flame in a suppressed manner.   First letter clue   7. convert into vapor.   First letter clue